EP2618921A1 - Mixer - Google Patents
MixerInfo
- Publication number
- EP2618921A1 EP2618921A1 EP12748673.6A EP12748673A EP2618921A1 EP 2618921 A1 EP2618921 A1 EP 2618921A1 EP 12748673 A EP12748673 A EP 12748673A EP 2618921 A1 EP2618921 A1 EP 2618921A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixer
- mixing
- chamber
- mixer according
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/62—Applicators, e.g. syringes or guns
- A61C5/64—Applicators, e.g. syringes or guns for multi-component compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
- A61C5/68—Mixing dental material components for immediate application to a site to be restored, e.g. a tooth cavity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/0026—Syringes or guns for injecting impression material; Mixing impression material for immediate use
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/50—Movable or transportable mixing devices or plants
- B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
- B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
- B01F33/50112—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held of the syringe or cartridge type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
- B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
- B05C17/00566—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components with a dynamic mixer in the nozzle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/19—Mixing dentistry compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/2305—Mixers of the two-component package type, i.e. where at least two components are separately stored, and are mixed in the moment of application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/07—Stirrers characterised by their mounting on the shaft
- B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
- B01F27/0722—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis perpendicular with respect to the rotating axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/07—Stirrers characterised by their mounting on the shaft
- B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
- B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis
Definitions
- the invention relates to a mixer for mixing two components, for example components of a hardenable dental material.
- the mixer is essentially formed by a mixer housing, a mixing element and a lid.
- a mixing chamber is formed with an outlet opening.
- the mixing element extends into the mixing space and may be rotationally driven to mix the components in the mixing space.
- the lid is connected to the mixer housing and has two inlet ports for the two components.
- an annular chamber is formed, which is fluidly connected to the mixing space.
- a mixer of the type mentioned in which in the mixer housing an antechamber, a mixing chamber and a post-mixing chamber are formed.
- the two components to be mixed first arrive together in the antechamber where they are distributed around the axis of rotation of the mixing element designed as a mixing rotor by means of a distributor body.
- the distributor body has a longitudinal cross-section which is curved in the direction of the rotor hub.
- the components may flow around the manifold body after premixing in the prechamber and enter the downstream mixing chamber, which is bounded by a plate on the mixing rotor. For example, this plate has slots through which the mixture can pass into the post-mixing chamber located downstream of the mixing chamber.
- mixers are proposed in which a delay or stagnation chamber is provided in the flow path of the precursor-prone component between the inlet stub and the mixing chamber, which comprises at least one part picks up the pre-tilting component. Only after filling this delay or stowage chamber does the component, which tends to precursor, enter the mixing chamber, resulting in a better mixing ratio at the beginning of the mixing process.
- the delay or stowage chamber extends arcuately by almost 180 ° in a plane offset from the mixing chamber, while the other component (catalyst component) extends to the delay line.
- EP 1 149 627 A2 and EP 2 190 563 B1 disclose mixers in which both components reach the mixing chamber directly without the provision of a delay or storage chamber.
- shell-like elements are designed to prevent rapid flow through the components through the mixing chamber. The problem of inadequate mixing ratio of pre-prone components is not solved by these mixers.
- EP 1 892 033 B1 discloses a mixer which at the same time is a dynamic mixer and a static mixer.
- Object of the present invention is in contrast to provide a mixer of the type mentioned, in which at the lowest possible flow resistance for the components to be mixed from the beginning a uniform mixing ratio in the mixture emerging from the mixer can be produced.
- the chamber is preferably designed as a ring reservoir chamber, which is delimited by the lid and a plate provided on the mixing element.
- a first of the two inlet ports opens into this annular reservoir chamber, while the second of the two inlet ports opens downstream of the plate into the mixing chamber.
- the invention is based on the idea that, in the case of a mixing element rotating during operation, ie in the case of a dynamic mixer, the ring reservoir chamber is also filled up by the component which tends to precede, if no sufficient back pressure in the still empty mixing room is present. The precursor tends component is actively distributed by the rotating mixing element in the ring reservoir chamber so that it fills up.
- the annular reservoir chamber and the first inlet nozzle opening into it overlap at least in regions in the axial direction of the mixer.
- the component entering the mixer through the first inlet port can at least partially pass directly into the ring reservoir chamber without a deflection.
- the second inlet port or a subsequent thereto channel is configured such that it opens in the radial direction in the mixing chamber.
- the flow paths or channels leading from the inlet stubs into the mixing chamber are preferably designed such that one of the components essentially reaches the mixing chamber in the radial direction and another component essentially in the axial direction, whereby already in this arrangement Meeting of the components from different flow directions already takes place a good mixing.
- the plate provided on the mixing element is intended to prevent the component, which tends to precede, from penetrating directly into the mixing space.
- this component should after active filling of the annulus can continue to flow through the rotational movement in the mixing chamber, without increasing the flow resistance within the mixer too strong.
- a plurality of recesses are provided, in particular on the radially outer region of the plate.
- carriers are preferably formed on the mixing element or on the plate. These drivers may be formed as extending transversely to the plate of the mixing element webs or walls. Preferably, on both sides of the at least one opening connecting the ring reservoir chamber and the mixing chamber opening such carriers are provided.
- the active filling of the ring reservoir chamber by the rotational movement as well as a minimization of the flow resistance within the mixer can be achieved in that the ring reservoir chamber is formed as a penetrated by the sectionally cylindrical mixing element cylindrical cavity.
- the ring reservoir chamber may be formed approximately rectangular in a longitudinal section of the mixer and penetrated by the preferably cylindrically shaped portion of the mixing element.
- the mixer housing has, according to a preferred embodiment of the invention, a first cylindrical section, which, for example, conically tapers toward the outlet opening and encloses the mixing space.
- a second cylindrical portion is preferably provided on the mixer housing, which receives the lid.
- the first cylindrical section is preferably connected to the second cylindrical section via a radially extending wall.
- the sealing between the cover and the mixer housing can take place in opposite directions in the axial direction.
- a labyrinth seal is provided, for example in the form of a circumferential annular groove in the lid, in which engages an annular circumferential ridge of the mixer housing.
- the cover is initially held in the mixer housing in a freely rotatable manner, for example via a latching connection, whereby the seal does not yet have to completely seal off.
- a particularly good seal can be achieved in that the cover and the mixer housing made of different hard materials.
- the lid can be made of a softer material, eg polypropylene (PP) or polyethylene (PE), and the mixer housing of a harder material, eg polyoxymethylene (POM), in particular highly transparent polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) or polycarbonate ( PC).
- the mixing element is preferably made of POM or a plastic with similar material properties, which also allows a good seal to the softer cover.
- the lid of the mixer is preferably freely rotatable and axially fixed received in the mixer housing.
- the mixing element is also freely rotatable and as axially fixed as possible in the mixer housing and the lid. This embodiment of the mixer with a lid which can rotate freely relative to the mixer housing allows a multiplicity of different types of fastening of the mixer, for example on a cartridge system.
- the mixer housing is partially threaded on its outside.
- This, preferably self-locking, thread makes it possible to screw the mixer housing in a corresponding internal thread of a cartridge system, wherein the inlet nozzle of the cover with corresponding outlet nozzle of the cartridge system can be brought into overlap or engaged.
- the mixer can be easily screwed onto a cartridge system in this way or separated by unscrewing it again.
- the cartridge and the mixer may be equipped with locking elements which engage with each other when the threads of the mixer and the cartridge are screwed together. This can on the one hand prevent accidental detachment of the mixer from the cartridge and on the other hand give a user a tactile and / or acoustic feedback that the mixer is properly attached.
- the lid is preferably formed integrally with at least one parallel to the inlet nozzle extending positioning tongue. This positioning tongue can, preferably even before the inlet stub come into contact with outlet ports of the cartridge system, engage in a corresponding opening of the cartridge system, so ensure proper alignment of the mixer to the cartridge system in the special inlet mixer with exit card.
- screw-in vanes are provided on the front side on a radial wall of the mixer housing in order to facilitate the attachment or detachment of the mixer from a cartridge.
- the threaded wings in the housing are preferably fixed only to the radial wall, i. with a distance from the cylindrical wall of the mixing chamber.
- the attachment or detachment of the mixer from a cartridge can additionally or alternatively be facilitated by a corrugation and / or knurling.
- the ribbing and / or knurling is preferably designed for haptic reasons by grooves (instead of by protruding ribs).
- the mixing element may be provided with a threading geometry, which facilitates the insertion of a drive shaft in the mixing element.
- This can be, for example, a conical chamfer or other chamfer, which makes it easier for the inner hexagonal contour of the mixing element and the drive shaft provided with an outer hexagon to be found when they are inserted into one another and aligned automatically.
- the second of the two inlet ports opens via a channel into the mixing chamber, which passes laterally or parallel to the ring reservoir chamber or passes therethrough.
- FIG. 1 shows a perspective view of a mixer according to the invention
- FIG. 2 shows in a first exploded view the components of the mixer according to FIG. 1,
- FIG. 3 shows in a further exploded view the components of the mixer according to FIG. 1,
- FIG. 4 is a perspective view of the lid and the mixing element of the mixer of Figure 1, Figure 5 in a partially broken perspective view of the mixer of Figure
- FIG. 6 shows a sectional view of the mixer according to FIG. 1
- FIG. 7 shows a cartridge for use with a mixer according to the invention
- FIG. 10 is a perspective view of another embodiment of a mixer; 1 1 in a sectional view of the mixer according to FIG. 13 in a cartridge system, FIG.
- Figure 12 is a partially broken perspective view of another embodiment of a mixer.
- FIG. 13 is a perspective view of the mixing element of the mixer according to FIG. 12.
- the mixer 1 according to the invention shown in the figures is a dynamic mixer which consists of a mixer housing 2, a cover 3 and a mixing element 4.
- the mixer housing 2 has a first cylindrical section 5, which tapers at the left end in FIG. 1 to form an outlet opening 6. From the first cylindrical portion 5 branches off a radially extending, flange-like wall 7, which connects the first cylindrical portion 5 with a second cylindrical portion 8.
- the second cylindrical section 8 has a larger diameter than the first cylindrical section 5.
- the lid 3 has on its right in Figure 1 sides two inlet ports 12, 13 for the components to be mixed.
- the inlet ports 12, 13 are in the illustrated embodiment configured with a different diameter, so that components are mixed in different volume ratio with each other. Notwithstanding the representation in the figures, it is also possible to process other volume ratios or identical volume ratios by corresponding adaptation of the geometry of the inlet connection in a mixer.
- FIG. 7 also shows a ring 24 provided in the outlet area of the cartridge 23, which has an internal thread for connection to the thread segment 9.
- the catalyst paste or the base paste of a two-component mixture to the other channel is arcuately curved in cross section, so that the inlet nozzle 12, 13 automatically meet the outlet nozzle of a cartridge 23 when the positioning tongue 14 is inserted into a correspondingly shaped opening 26 of the cartridge.
- FIG. 7 also shows a ring 24 provided in the outlet area of the cartridge 23, which has an internal thread for connection to the thread segment 9.
- the positioning tongue 14 comes in touching contact with the corresponding receptacle on the cartridge at a certain point, whereby initially there is play between the positioning tongue 14 and the receptacle 26 in the cartridge. Thereafter, the positioning tongue acts as a guide rail in a, for example tapered, channel in the cartridge. As a result, thereby the mixer 1 through the axial insertion of the positioning tab 14 automatically centered and aligned in the cartridge 23.
- a locking lip 15 is formed, which cooperates with the locking elements 1 1 of the mixer housing 2 for fixing the lid 3 in the mixer housing 2.
- the cover 3 can be fixed in this way freely rotatable but axially fixed within the mixer housing 2.
- a central passage opening is formed, which is enclosed by a collar 16, which forms a sliding bearing for the mixing element 4.
- a substantially cylindrical free space which partially surrounds the collar 16, is provided in the cover 3. This clearance forms in the mixer 1, inter alia, a ring reservoir chamber 17.
- the diameter of the free space and the position of the inlet nozzle 13 are selected so that the free space and the opening of the inlet nozzle 13 partially overlap in the axial direction.
- a component flowing in through the inlet connection 13 can thus reach the ring reservoir chamber 17 at least partially without deflection. This component then passes in the axial direction in the mixing chamber.
- the channel-like prolonged inlet connection 12 opens with a radial opening directly into a region of the cylindrical clearance of the cover 3 counting to the mixing chamber.
- the mixing element 4 is designed as a drivable mixer rod which is right at its in FIG End is designed as a hollow shaft with a réellesechskantkon- tur, in which a hexagonal drive shaft can engage.
- the rotatably guided in the collar 16 of the lid 3 section of the mixing element 4 is partially cylindrical.
- a radially extending away from this, circular plate 18 is provided on the mixing element 4.
- a radially extending away from this, circular plate 18 is provided on the mixing element 4.
- four ring-segment-like recesses 19 are formed in the radially outer region of the plate 18, each extending slightly less than 90 °.
- webs of the plate 18 drivers 20 are formed, which are formed by perpendicular to the plate 18 extending walls.
- the plate 18 defines a boundary wall for the mixing chamber 17, which is formed in the lid 3.
- the position of the plate 18 on the mixing element 4 is chosen so that only the passing through the inlet port 13 into the mixer component is passed into the ring reservoir chamber 17, is actively distributed there and flows from there into the mixing chamber.
- the component entering the mixer through the inlet connection 12 is introduced radially on the opposite side of the plate 18 into the mixing chamber of the mixer 1, which is essentially enclosed by the first cylindrical section 5 of the mixer housing 2.
- the plate 18 thus separates the annular reservoir chamber 17 from the mixing chamber and, due to the recesses 19, allows a flow connection between the annular reservoir chamber 17 and the mixing chamber.
- the inflow of the components is orthogonal to each other, whereby a good mixture is achieved without the flow resistance increases significantly.
- arms 21 are arranged on the mixing element 4 in several planes, which serve to mix the two components in the mixing chamber.
- the mixing element 4 is freely rotatably guided in the lid 3, wherein the provided with the arms 21 Ab- section of the mixing element 4 is received in the first cylindrical portion 5 of the mixer housing 2.
- the cover 3 is freely rotatably connected to the mixer housing 2 by the locking lip 15 of the locking elements
- Mixer housing 2 which engages in a corresponding groove 22 in the lid 3 in the manner of a labyrinth seal, which then engages when a mixer is non-positively screwed into the cartridge.
- the plate 18 of the mixing element 4 is in a position that the two through the inlet port
- the component flowing in through the inlet pipe 13 also passes through the recesses 19 into the mixing chamber.
- This component thus enters the mixing chamber in the axial direction.
- the component supplied through the inlet port 12 enters the mixing chamber in the radial direction, resulting in a good mixing of the two components already initially.
- This mixing is further intensified by the arms 21 rotating with the mixing element 4, so that a homogeneous mixture of the two components emerges from the outlet opening 6.
- the mixer shown in Figures 10 and 1 1 has on the lid 3 annular end-side sealing surfaces 27 which are provided around the inlet channels 12, 13 around and on which the respective outlet nozzle of the cartridge come to rest. These sealing surfaces cause an additional end-side sealing effect to the radial sealing surface on the outer circumference of the nozzle.
- FIGS. 12 and 13 Another embodiment of a mixer according to the invention is shown in FIGS. 12 and 13.
- the mixing element 4 is formed modified relative to the embodiment of Figure 9.
- the drivers 20 on the plate 18 are extended in the direction of the cartridge, so that the annular reservoire chamber 17 in Figure 12 is substantially completely closed down.
- Table 1 show that the measured discharge forces when using the flow-optimized dynamic mixer according to the invention are significantly below the values measured with the same impression materials with prior art dynamic mixers.
- Comparative Example 1 Sulzer Mixpac System, Mixer MBD 381 -05-HS, Article No. 1 1 621 1, Lot no. SO041 05 (according to EP 1 943 012)
- Comparative Example 3 Zhermack system (according to EP 1 892 033)
- the abovementioned impression materials were filled into the respective cartridge / M ischer system and recorded the discharge forces via a corresponding measuring device on the universal testing machine Zwick Z 0100 at a feed rate of 46 mm / min with rotation of the dynamic mixer at 700 U / min. 2)
- the mechanical stability of the cartridge is not sufficient to absorb the forces occurring. At 5300 N the cartridge burst.
- This cartridge / mixer combination is not suitable for discharging heavy consistencies.
- the mechanical stability of the cartridge is not sufficient to absorb the forces occurring.
- This cartridge / mixer combination is not suitable for dispensing putty consistencies.
- the mechanical stability of the cartridge is not sufficient to absorb the forces occurring.
- the measured values also show that in the dynamic mixers according to the prior art, the tightness becomes acceptable only after cost-intensive technical measures, for example by installation an O-ring seal in the range mixer rod to mixer cover (see comparison of examples Zhermack 2009 to Zhermack 2012) or by introducing an ultrasonic welding between mixer cover and mixer sleeve (see comparison of the examples Sulzer-Mixpac 2008 to Sulzer-Mixpac 201 1).
- the choice of highly transparent PET in the mixer sleeve is possible because no ultrasonic welding between mixer cover and mixer sleeve is required in the mixer according to the invention.
- the high transparency leads to a good visual control in the mixer during the mixing process.
- Comparative Example 1 Sulzer Mixpac System 2008, Article: MDB 381 -05-00 (according to EP 1 943 012)
- the impression material Identium medium was filled into the respective cartridge / mixer system and discharged for one minute with a commercially available discharge device (Renfert Sympress II) with a feed rate of 46 mm / min and a mixer speed of 700 rpm and mixed.
- the tightness of the respective dynamic mixer is evaluated visually at the sealing point of the mixing rod to the mixer cover and at the sealing point of the mixing sleeve to the mixer cover by means of a scale from ++ to - -:
- the impression material Identium medium was filled into the respective cartridge / mixer system and mixed for one minute with a commercial discharge device (Renfert Sympress II) and discharged.
- a commercial discharge device Renfert Sympress II
- the high transparency enables optimal visual mixing control of the user
- the transparency of the respective plastic is visually evaluated on the mixer sleeve using a scale from ++ to - -:
- Comparative Example 2 DMG system (according to DE 10 2004 008 748)
- a medium-flowing Dentalabfornnnnaterial, type 2 according to ISO 4823 was filled into the respective cartridge / mixer system and discharged via a Sympress I - dispensing device from. Renfert and mixed on the respective dynamic mixer.
- the degree of filling of the respective storage chamber / ring reservoir chamber was assessed visually by stopping the mixing operations after 1 s, 1, 5 s, 2 s, 2.5 s, 3 s and 4 s.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
Description
Mischer mixer
Die Erfindung betrifft einen Mischer zum Mischen von zwei Komponenten, beispielsweise von Komponenten eines aushärtbaren Dentalmaterials. Der Mischer wird im Wesentlichen durch ein Mischergehäuse, ein Mischelement und einen Deckel gebildet. In dem Mischergehäuse ist ein Mischraum mit einer Auslassöffnung ausgebildet. Das Mischelement erstreckt sich in den Mischraum hinein und kann rotatorisch angetrieben sein, um die Komponenten in dem Mischraum zu vermischen. Der Deckel ist mit dem Mischergehäuse verbunden und weist zwei Einlassstutzen für die beiden Komponenten auf. In dem Mischer ist eine ringförmige Kammer ausgebildet, die mit dem Mischraum strömungsverbunden ist. The invention relates to a mixer for mixing two components, for example components of a hardenable dental material. The mixer is essentially formed by a mixer housing, a mixing element and a lid. In the mixer housing, a mixing chamber is formed with an outlet opening. The mixing element extends into the mixing space and may be rotationally driven to mix the components in the mixing space. The lid is connected to the mixer housing and has two inlet ports for the two components. In the mixer, an annular chamber is formed, which is fluidly connected to the mixing space.
Aus der EP 1 943 012 B1 ist ein Mischer der eingangs genannten Art bekannt, bei welchem in dem Mischergehäuse eine Vorkammer, eine Mischkammer und eine Nachmischkammer ausgebildet sind. Die beiden zu mischenden Komponenten gelangen zunächst gemeinsam in die Vorkammer wo sie um die Dreh- achse des als Mischrotor ausgebildeten Mischelements mittels eines Verteilkörpers verteilt werden. Der Verteilkörper weist einen Längsquerschnitt auf, der in Richtung der Rotornabe gekrümmt ist. Die Komponenten können nach einer Vormischung in der Vorkammer um den Verteilerkörper herumfließen und gelangen in die stromabwärts gelegene Mischkammer, welche durch eine Platte auf dem Mischrotor begrenzt wird. Diese Platte weist beispielsweise Schlitze auf, durch welche das Gemisch in die stromabwärts der Mischkammer gelegene Nachmischkammer gelangen kann. From EP 1 943 012 B1 a mixer of the type mentioned is known in which in the mixer housing an antechamber, a mixing chamber and a post-mixing chamber are formed. The two components to be mixed first arrive together in the antechamber where they are distributed around the axis of rotation of the mixing element designed as a mixing rotor by means of a distributor body. The distributor body has a longitudinal cross-section which is curved in the direction of the rotor hub. The components may flow around the manifold body after premixing in the prechamber and enter the downstream mixing chamber, which is bounded by a plate on the mixing rotor. For example, this plate has slots through which the mixture can pass into the post-mixing chamber located downstream of the mixing chamber.
Beim Vermischen zweier Komponenten beispielsweise für ein Dentalmaterial besteht ein bekanntes Problem darin, dass häufig eine der beiden Komponen- ten, meist die Basis-Komponente, gegenüber der anderen Komponente (Katalysator-Komponente) zum Vorlaufen neigt, so dass zu Beginn des Mischvorgangs ein deutlicher Überschuss an Basis-Komponente in der Vorkammer vorliegt. In der Praxis wird daher häufig eine Anfangsmenge des aus dem Mischer austre- tenden Gemisches verworfen und erst das nachfolgende aus dem Mischer austretende Gemisch beispielsweise für eine Abformung oder dergleichen verwendet. When mixing two components, for example for a dental material, a known problem is that often one of the two components th, usually the base component, compared to the other component (catalyst component) tends to precede, so that at the beginning of the mixing process, a significant excess of base component in the antechamber is present. In practice, therefore, an initial amount of the mixture exiting the mixer is often discarded and only the subsequent mixture leaving the mixer is used, for example, for an impression or the like.
In der DE 101 12 904 A1 und der DE 10 2004 008 748 A1 werden daher Mi- scher vorgeschlagen, bei welchen in dem Strömungsweg der zum Vorlaufen neigenden Komponente zwischen dem Einlassstutzen und dem Mischraum eine Verzogerungs- oder Staukammer vorgesehen ist, die zumindest einen Teil der zum Vorlaufen neigenden Komponente aufnimmt. Erst nach Auffüllen dieser Verzogerungs- oder Staukammer gelangt die zum Vorlaufen neigende Kompo- nente in den Mischraum, wodurch zu Beginn des Mischvorgangs ein besseres Mischungsverhältnis entsteht. Bei den aus der DE 101 12 904 A1 oder der DE 10 2004 008 748 A1 bekannten Mischern erstreckt sich die Verzögerungsoder Staukammer in einer zu dem Mischraum versetzten Ebene bogenförmig um knapp 180°, während die andere Komponente (Katalysator-Komponente) an der Verzogerungs- oder Staukammer vorbei direkt in den Mischraum geleitet wird. In der Praxis hat sich gezeigt, dass diese bekannten Verzogerungs- oder Staukammern sich erst dann vollständig mit der zum Vorlaufen neigenden Komponente füllen, wenn der eigentliche Mischraum vollständig befüllt ist und dadurch für die zum Vorlaufen neigende Komponente ein Gegendruck entsteht. Die Verbesserung des Mischungsverhältnisses tritt dadurch nicht immer zuverlässig ein. In DE 101 12 904 A1 and DE 10 2004 008 748 A1, therefore, mixers are proposed in which a delay or stagnation chamber is provided in the flow path of the precursor-prone component between the inlet stub and the mixing chamber, which comprises at least one part picks up the pre-tilting component. Only after filling this delay or stowage chamber does the component, which tends to precursor, enter the mixing chamber, resulting in a better mixing ratio at the beginning of the mixing process. In the mixers known from DE 101 12 904 A1 or DE 10 2004 008 748 A1, the delay or stowage chamber extends arcuately by almost 180 ° in a plane offset from the mixing chamber, while the other component (catalyst component) extends to the delay line. or congestion chamber is passed directly into the mixing room. In practice, it has been found that these known delay or storage chambers only completely fill with the prone to precursor component, when the actual mixing chamber is completely filled and thus creates a back pressure for the prone to run component. The improvement of the mixing ratio does not always occur reliably.
Weiter sind aus der EP 1 149 627 A2 und der EP 2 190 563 B1 Mischer bekannt, bei welchen beide Komponenten ohne Vorschaltung einer Verzögerungs- oder Staukammer direkt in den Mischraum gelangen. An dem drehbaren Mischelement sind dabei schalenartige Elemente ausgebildet, die ein rasches Durchströmen der Komponenten durch den Mischraum verhindern sollen. Das Problem eines unzureichenden Mischungsverhältnisses bei zum Vorlaufen neigenden Komponenten wird durch diese Mischer nicht gelöst. Furthermore, EP 1 149 627 A2 and EP 2 190 563 B1 disclose mixers in which both components reach the mixing chamber directly without the provision of a delay or storage chamber. On the rotatable Mixing element shell-like elements are designed to prevent rapid flow through the components through the mixing chamber. The problem of inadequate mixing ratio of pre-prone components is not solved by these mixers.
Aus der EP 1 458 467 B1 ist ein Mischer bekannt, bei dem eine axiale Verzögerungskammer für eine der beiden Komponenten vorgesehen ist. Die Komponente wird hierbei durch ein Knie geführt, d.h. in axialer Richtung in einem U- förmigen Stück umgelenkt. Dies führt zwar zu der gewünschten Verzögerung dieser Komponente, erhöht jedoch auch den Strömungswiderstand des Mischers. From EP 1 458 467 B1 a mixer is known in which an axial delay chamber is provided for one of the two components. The component is guided through a knee, i. deflected in the axial direction in a U-shaped piece. Although this leads to the desired delay of this component, but also increases the flow resistance of the mixer.
Weiter ist aus der EP 1 892 033 B1 ein Mischer bekannt, der gleichzeitig ein dynamischer Mischer und ein statischer Mischer ist. Furthermore, EP 1 892 033 B1 discloses a mixer which at the same time is a dynamic mixer and a static mixer.
Aufgabe der vorliegenden Erfindung ist es demgegenüber, einen Mischer der eingangs genannten Art bereitzustellen, bei welchem bei möglichst geringen Fließwiderständen für die zu mischenden Komponenten ein von Anfang an gleichmäßiges Mischungsverhältnis in dem aus dem Mischer austretenden Gemisch hergestellt werden kann. Object of the present invention is in contrast to provide a mixer of the type mentioned, in which at the lowest possible flow resistance for the components to be mixed from the beginning a uniform mixing ratio in the mixture emerging from the mixer can be produced.
Diese Aufgabe wird erfindungsgemäß mit einem Mischer nach Anspruch 1 gelöst. Hierbei ist die Kammer vorzugsweise als eine Ringreservoirkammer ausgebildet, die durch den Deckel sowie eine auf dem Mischelement vorgese- hene Platte begrenzt wird. Ein erster der beiden Einlassstutzen mündet dabei in diese Ringreservoirkammer, während der zweite der beiden Einlassstutzen stromabwärts der Platte in den Mischraum mündet. Der Erfindung liegt dabei der Gedanke zugrunde, dass bei einem im Betrieb rotierenden Mischelement, d.h. bei einem dynamischen Mischer, die Ringreservoirkammer auch dann durch die zum Vorlaufen neigende Komponente aufgefüllt wird, wenn noch kein ausrei- chender Gegendruck in dem noch leeren Mischraum vorhanden ist. Die zum Vorlaufen neigende Komponente wird dabei aktiv durch das sich drehende Mischelement in der Ringreservoirkammer verteilt, so dass diese sich auffüllt. Durch die räumlich versetzte Zufuhr der beiden Komponenten auf den beiden gegenüberliegenden Seiten der Platte des Mischelements ist sichergestellt, dass nur die zum Vorlaufen neigende Komponente in der Ringreservoirkammer zurückgehalten wird, während im Mischraum von Beginn des Mischvorgangs an ein gleichmäßiges Mischungsverhältnis der Komponenten eintritt. Um auch bei höheren Austraggeschwindigkeiten und/oder zäheren Komponenten einen möglichst geringen Fließwiderstand innerhalb des Mischers zu erreichen, überdecken sich die Ringreservoirkammer und der in diese mündende erste Einlassstutzen in axialer Richtung des Mischers zumindest bereichsweise. Mit anderen Worten kann die durch den ersten Einlassstutzen in den Mischer gelangende Komponente zumindest teilweise ohne eine Umlenkung unmittelbar in die Ringreservoirkammer gelangen. Es wird bevorzugt, wenn der zweite Einlassstutzen beziehungsweise ein an diesen anschließender Kanal derart ausgestaltet ist, dass dieser in radialer Richtung in den Mischraum mündet. Dies verbessert die Durchmischung der beiden Komponenten in dem stromaufwärts gelegenen Bereich des Mischraumes. Mit anderen Worten sind die von den Einlassstutzen in den Mischraum führende Strömungswege bzw. Kanäle vorzugsweise derart ausgestaltet sind, dass eine der Komponenten im Wesentlichen in radialer Richtung und eine andere Komponente im Wesentlichen in axialer Richtung in den Mischraum gelangen, wodurch schon bei diesem Aufei- nandertreffen der Komponenten aus unterschiedlichen Strömungsrichtungen bereits eine gute Durchmischung stattfindet. This object is achieved with a mixer according to claim 1. In this case, the chamber is preferably designed as a ring reservoir chamber, which is delimited by the lid and a plate provided on the mixing element. A first of the two inlet ports opens into this annular reservoir chamber, while the second of the two inlet ports opens downstream of the plate into the mixing chamber. The invention is based on the idea that, in the case of a mixing element rotating during operation, ie in the case of a dynamic mixer, the ring reservoir chamber is also filled up by the component which tends to precede, if no sufficient back pressure in the still empty mixing room is present. The precursor tends component is actively distributed by the rotating mixing element in the ring reservoir chamber so that it fills up. By the spatially offset supply of the two components on the two opposite sides of the plate of the mixing element ensures that only the tendency to precursor component is retained in the Ringreservoirkammer, while in the mixing chamber from the beginning of the mixing process occurs at a uniform mixing ratio of the components. In order to achieve the lowest possible flow resistance within the mixer even at higher discharge speeds and / or tougher components, the annular reservoir chamber and the first inlet nozzle opening into it overlap at least in regions in the axial direction of the mixer. In other words, the component entering the mixer through the first inlet port can at least partially pass directly into the ring reservoir chamber without a deflection. It is preferred if the second inlet port or a subsequent thereto channel is configured such that it opens in the radial direction in the mixing chamber. This improves the mixing of the two components in the upstream region of the mixing chamber. In other words, the flow paths or channels leading from the inlet stubs into the mixing chamber are preferably designed such that one of the components essentially reaches the mixing chamber in the radial direction and another component essentially in the axial direction, whereby already in this arrangement Meeting of the components from different flow directions already takes place a good mixing.
Die an dem Mischelement vorgesehene Platte soll einerseits verhindern, dass die zum Vorlaufen neigende Komponente unmittelbar in den Mischraum gelangt. Andererseits soll diese Komponente nach dem aktiven Auffüllen des Ringraums durch die Rotationsbewegung in den Mischraum weiterfließen können, ohne den Strömungswiderstand innerhalb des Mischers zu stark zu vergrößern. Hierzu wird es bevorzugt, wenn in der Platte wenigstens eine die Ringreservoirkannnner mit dem Mischraum verbindende Öffnung ausgebildet ist. Vorzugsweise sind mehrere Aussparungen insbesondere am radial äußeren Bereich der Platte vorgesehen. On the one hand, the plate provided on the mixing element is intended to prevent the component, which tends to precede, from penetrating directly into the mixing space. On the other hand, this component should after active filling of the annulus can continue to flow through the rotational movement in the mixing chamber, without increasing the flow resistance within the mixer too strong. For this purpose, it is preferred if at least one opening connecting the ring reservoirs to the mixing space is formed in the plate. Preferably, a plurality of recesses are provided, in particular on the radially outer region of the plate.
Um die Verteilung der zum Vorlaufen neigenden Komponente innerhalb der Ringreservoirkammer weiter zu verbessern, sind vorzugsweise an dem Mische- lement beziehungsweise an der Platte Mitnehmer ausgebildet. Diese Mitnehmer können als quer zu der Platte des Mischelements verlaufende Stege oder Wände ausgebildet sein. Vorzugsweise sind beidseits der wenigstens einen die Ringreservoirkammer und den Mischraum verbindenden Öffnung derartige Mitnehmer vorgesehen. Dies hat den weiteren Vorteil, dass beim Abschalten des Mischers ein Nachfließen beziehungsweise Rückfließen einer Komponente in den Einlassstutzen der anderen Komponente aufgrund von Druckschwankungen weitestgehend vermieden werden kann. Das Risiko einer sogenannten Rück-Kontamination wird hierdurch minimiert. Das aktive Auffüllen der Ringreservoirkammer durch die Rotationsbewegung sowie eine Minimierung des Fließwiderstands innerhalb des Mischers kann dadurch erreicht werden, dass die Ringreservoirkammer als ein von dem abschnittsweise zylindrischen Mischelement durchsetzter zylindrischer Hohlraum ausgebildet ist. So kann die Ringreservoirkammer in einem Längsschnitt des Mischers annähernd rechteckig und von dem vorzugsweise zylindrisch gestalteten Abschnitt des Mischelements durchsetzt ausgebildet sein. In order to further improve the distribution of the precursor-prone component within the annular reservoir chamber, carriers are preferably formed on the mixing element or on the plate. These drivers may be formed as extending transversely to the plate of the mixing element webs or walls. Preferably, on both sides of the at least one opening connecting the ring reservoir chamber and the mixing chamber opening such carriers are provided. This has the further advantage that, when the mixer is switched off, subsequent flow or backflow of a component into the inlet connection of the other component can largely be avoided due to pressure fluctuations. The risk of so-called re-contamination is thereby minimized. The active filling of the ring reservoir chamber by the rotational movement as well as a minimization of the flow resistance within the mixer can be achieved in that the ring reservoir chamber is formed as a penetrated by the sectionally cylindrical mixing element cylindrical cavity. Thus, the ring reservoir chamber may be formed approximately rectangular in a longitudinal section of the mixer and penetrated by the preferably cylindrically shaped portion of the mixing element.
Das Mischergehäuse weist nach einer bevorzugten Ausführungsform der Erfindung einen sich zu der Auslassöffnung hin beispielsweise konisch verjüngenden ersten zylindrischen Abschnitt auf, der den Mischraum umschließt. Um für die Ringreservoirkammer ein ausreichend großes Volumen bereitstellen zu können, ist vorzugsweise ein zweiter zylindrischer Abschnitt an dem Mischergehäuse vorgesehen, welcher den Deckel aufnimmt. Der erste zylindrische Abschnitt ist dabei bevorzugt mit dem zweiten zylindrischen Abschnitt über eine sich radial erstreckende Wand verbunden. The mixer housing has, according to a preferred embodiment of the invention, a first cylindrical section, which, for example, conically tapers toward the outlet opening and encloses the mixing space. In order for the Ring reservoir chamber to provide a sufficiently large volume, a second cylindrical portion is preferably provided on the mixer housing, which receives the lid. The first cylindrical section is preferably connected to the second cylindrical section via a radially extending wall.
Insbesondere bei der zuvor genannten Ausführungsform mit einer sich radial erstreckenden Wand zwischen zwei zylindrischen Abschnitten des Mischergehäuses kann die Abdichtung zwischen dem Deckel und dem Mischergehäuse in einander in axialer Richtung gegenüberliegenden Flächen erfolgen. Vorzugsweise ist hierzu eine Labyrinthdichtung vorgesehen, beispielsweise in Form einer umlaufenden ringförmigen Nut in dem Deckel, in welche ein ringförmig umlaufender Steg des Mischergehäuses eingreift. Hierbei wird es bevorzugt, wenn der Deckel zunächst nur, bspw. über eine Rastverbindung, frei drehbar in dem Mischergehäuse gehalten ist, wobei die Dichtung noch nicht vollständig abdichten muss. Durch die Schraub-Befestigung des Mischers an einer Kartusche wird der Deckel erst bei Benutzung des Mischers fest gegen das Mischergehäuse gepresst, wodurch die Dichtung abdichtet. Die endgültige Abdichtung der beiden Teile erfolgt somit erst durch Einschrauben des Mischers mit Außen- gewinde in das korrespondierende Innengewinde der Kartusche. In particular, in the aforementioned embodiment, with a radially extending wall between two cylindrical sections of the mixer housing, the sealing between the cover and the mixer housing can take place in opposite directions in the axial direction. Preferably, for this purpose, a labyrinth seal is provided, for example in the form of a circumferential annular groove in the lid, in which engages an annular circumferential ridge of the mixer housing. In this case, it is preferred if the cover is initially held in the mixer housing in a freely rotatable manner, for example via a latching connection, whereby the seal does not yet have to completely seal off. By screwing the mixer to a cartridge, the lid is only pressed firmly against the mixer housing during use of the mixer, whereby the seal seals. The final sealing of the two parts thus takes place only by screwing the mixer with external thread into the corresponding internal thread of the cartridge.
Eine besonders gute Abdichtung kann dabei dadurch erfolgen, dass der Deckel und das Mischergehäuse aus unterschiedlich harten Materialien bestehen. Bspw. kann der Deckel aus einem weicheren Material, z.B. Polypropylen (PP) oder Polyethylen (PE), und das Mischergehäuse aus einem härteren Material, z.B. Polyoxymethylen (POM), insbesondere hoch transparentes Polyethylen- terephthalat (PET), Polymethylmethacrylat (PMMA) oder Polycarbonat (PC), bestehen. Das Mischelement besteht vorzugsweise aus POM oder einem Kunststoff mit ähnlichen Materialeigenschaften, der ebenfalls eine gute Abdich- tung zu dem weicheren Deckel ermöglicht. Der Deckel des Mischers ist bevorzugt frei drehbar und axial fixiert in dem Mischergehäuse aufgenommen. Das Mischelement ist ebenfalls frei drehbar und möglichst axial fixiert in dem Mischergehäuse und dem Deckel gelagert. Diese Ausgestaltung des Mischers mit einem relativ zu dem Mischergehäuse frei drehbaren Deckel ermöglicht eine Vielzahl unterschiedlicher Befestigungsarten des Mischers, beispielsweise an einem Kartuschensystem. A particularly good seal can be achieved in that the cover and the mixer housing made of different hard materials. For example. the lid can be made of a softer material, eg polypropylene (PP) or polyethylene (PE), and the mixer housing of a harder material, eg polyoxymethylene (POM), in particular highly transparent polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) or polycarbonate ( PC). The mixing element is preferably made of POM or a plastic with similar material properties, which also allows a good seal to the softer cover. The lid of the mixer is preferably freely rotatable and axially fixed received in the mixer housing. The mixing element is also freely rotatable and as axially fixed as possible in the mixer housing and the lid. This embodiment of the mixer with a lid which can rotate freely relative to the mixer housing allows a multiplicity of different types of fastening of the mixer, for example on a cartridge system.
So wird es als besonders vorteilhaft erachtet, wenn das Mischergehäuse auf seiner Außenseite abschnittsweise mit einem Gewinde versehen ist. Dieses, vorzugsweise selbsthemmende, Gewinde ermöglicht es, das Mischergehäuse in ein entsprechendes Innengewinde eines Kartuschensystems einzuschrauben, wobei die Einlassstutzen des Deckels mit entsprechenden Auslassstutzen des Kartuschensystems in Überdeckung beziehungsweise in Eingriff gebracht sein können. Der Mischer lässt sich auf diese Weise leicht auf ein Kartuschensystem aufschrauben beziehungsweise durch Abschrauben wieder von diesem trennen. Thus, it is considered particularly advantageous if the mixer housing is partially threaded on its outside. This, preferably self-locking, thread makes it possible to screw the mixer housing in a corresponding internal thread of a cartridge system, wherein the inlet nozzle of the cover with corresponding outlet nozzle of the cartridge system can be brought into overlap or engaged. The mixer can be easily screwed onto a cartridge system in this way or separated by unscrewing it again.
Die Kartusche und der Mischer können mit Rastelementen ausgestattet sein, die ineinander eingreifen, wenn die Gewinde des Mischers und der Kartusche inei- nander eingeschraubt sind. Dies kann einerseits ein unbeabsichtigtes Ablösen des Mischers von der Kartusche verhindern und andererseits einem Benutzer eine taktile und/oder akustische Rückmeldung geben, dass der Mischer ordnungsgemäß befestigt ist. Um die Ausrichtung des Deckels bei der Verbindung des Mischers mit einem Kartuschensystem zu verbessern, ist der Deckel vorzugsweise einstückig mit wenigstens einer sich parallel zu den Einlassstutzen erstreckende Positionierungszunge ausgebildet. Diese Positionierungszunge kann, vorzugsweise noch bevor die Einlassstutzen mit Auslassstutzen des Kartuschensystems in Kontakt treten, in eine entsprechende Öffnung des Kartuschensystems eingreifen, um so die richtige Ausrichtung des Mischers zu dem Kartuschensystem im speziellen eintritt mischer mit austritt kart sicherzustellen. The cartridge and the mixer may be equipped with locking elements which engage with each other when the threads of the mixer and the cartridge are screwed together. This can on the one hand prevent accidental detachment of the mixer from the cartridge and on the other hand give a user a tactile and / or acoustic feedback that the mixer is properly attached. In order to improve the alignment of the lid in the connection of the mixer with a cartridge system, the lid is preferably formed integrally with at least one parallel to the inlet nozzle extending positioning tongue. This positioning tongue can, preferably even before the inlet stub come into contact with outlet ports of the cartridge system, engage in a corresponding opening of the cartridge system, so ensure proper alignment of the mixer to the cartridge system in the special inlet mixer with exit card.
Vorzugsweise sind stirnseitig an einer radialen Wand des Mischergehäuses Schraubflügel vorgesehen, um das Befestigen bzw. Lösen des Mischers von einer Kartusche zu erleichtern. Um einen Verzug zu vermeiden, sind die Schraubflügel im Gehäuse vorzugsweise nur an der radialen Wand befestigt, d.h. mit einem Abstand von der zylindrischen Wand der Mischkammer. Das Befestigen bzw. Lösen des Mischers von einer Kartusche kann zusätzlich oder alternativ hierzu durch eine Riffelung und/oder Rändelung erleichtert werden. Die Riffelung und/oder Rändelung ist aus haptischen Gründen vorzugsweise durch Nuten (statt durch vorstehende Rippen) ausgebildet. Weiter kann das Mischelement mit einer Einfädelgeometrie versehen sein, die das Einstecken einer Antriebswelle in das Mischelement erleichtert. Dies kann bspw. eine konische Fase oder andere Abschrägung sein, die es erleichtert, dass sich die Innensechskantkontur des Mischelements und die mit einem Au- ßensechskant versehene Antriebswelle beim Ineinanderstecken finden und selbsttätig ausrichten. Preferably, screw-in vanes are provided on the front side on a radial wall of the mixer housing in order to facilitate the attachment or detachment of the mixer from a cartridge. To avoid distortion, the threaded wings in the housing are preferably fixed only to the radial wall, i. with a distance from the cylindrical wall of the mixing chamber. The attachment or detachment of the mixer from a cartridge can additionally or alternatively be facilitated by a corrugation and / or knurling. The ribbing and / or knurling is preferably designed for haptic reasons by grooves (instead of by protruding ribs). Further, the mixing element may be provided with a threading geometry, which facilitates the insertion of a drive shaft in the mixing element. This can be, for example, a conical chamfer or other chamfer, which makes it easier for the inner hexagonal contour of the mixing element and the drive shaft provided with an outer hexagon to be found when they are inserted into one another and aligned automatically.
Es wird bevorzugt, wenn der zweite der beiden Einlassstutzen über einen Kanal in den Mischraum mündet, der seitlich bzw. parallel an der Ringreservoirkammer vorbeiführt oder durch diese hindurchführt. It is preferred if the second of the two inlet ports opens via a channel into the mixing chamber, which passes laterally or parallel to the ring reservoir chamber or passes therethrough.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels und unter Bezugnahme auf die Zeichnung näher erläutert. Dabei bilden alle beschrieben und/oder bildlich dargestellten Merkmale für sich den Gegenstand der Erfindung, unabhängig von Ihrer Zusammenfassung in den Ansprüchen oder deren Rückbezügen. Es zeigen schematisch: The invention will be explained in more detail using an exemplary embodiment and with reference to the drawing. All described and / or illustrated features form the subject of the invention, regardless of their summary in the claims or their back references. They show schematically:
Figur 1 in Perspektivansicht einen erfindungsgemäßen Mischer, 1 shows a perspective view of a mixer according to the invention,
Figur 2 in einer ersten Explosionsansicht die Komponenten des Mischers nach Figur 1 , FIG. 2 shows in a first exploded view the components of the mixer according to FIG. 1,
Figur 3 in einer weiteren Explosionsansicht die Komponenten des Mischers nach Figur 1 , FIG. 3 shows in a further exploded view the components of the mixer according to FIG. 1,
Figur 4 in Perspektivansicht den Deckel und das Mischelement des Mischers nach Figur 1 , Figur 5 in teilweise aufgebrochener Perspektivansicht den Mischer nach Figur Figure 4 is a perspective view of the lid and the mixing element of the mixer of Figure 1, Figure 5 in a partially broken perspective view of the mixer of Figure
1 , 1 ,
Figur 6 in Schnittansicht den Mischer nach Figur 1 , Figur 7 eine Kartusche zur Verwendung mit einem erfindungsgemäßen Mischer, 6 shows a sectional view of the mixer according to FIG. 1, FIG. 7 shows a cartridge for use with a mixer according to the invention,
Figur 8 in Schnittansicht die Strömungswege der Komponenten in einem erfindungsgemäßen Mischer, 8 shows a sectional view of the flow paths of the components in a mixer according to the invention,
Figur 9 in Perspektivansicht das Mischelement eines erfindungsgemäßen Figure 9 in perspective view of the mixing element of an inventive
Mischers, mixer,
Figur 10 in Perspektivansicht eine weitere Ausführungsform eines Mischers, Figur 1 1 in Schnittansicht den Mischer nach Figur 13 in einem Kartuschensystem, FIG. 10 is a perspective view of another embodiment of a mixer; 1 1 in a sectional view of the mixer according to FIG. 13 in a cartridge system, FIG.
Figur 12 in teilweise aufgebrochener Perspektivansicht eine weitere Ausführungsform eines Mischers, und Figure 12 is a partially broken perspective view of another embodiment of a mixer, and
Figur 13 in Perspektivansicht das Mischelement des Mischers nach Figur 12. FIG. 13 is a perspective view of the mixing element of the mixer according to FIG. 12.
Der in den Figuren dargestellte erfindungsgemäße Mischer 1 ist ein dynamischer Mischer, der aus einem Mischergehäuse 2, einem Deckel 3 und einem Mischelement 4 besteht. The mixer 1 according to the invention shown in the figures is a dynamic mixer which consists of a mixer housing 2, a cover 3 and a mixing element 4.
Das Mischergehäuse 2 weist einen ersten zylindrischen Abschnitt 5 auf, der sich an dem in Figur 1 linken Ende zu einer Auslassöffnung 6 verjüngt. Von dem ersten zylindrischen Abschnitt 5 zweigt eine radial verlaufende, flanschartige Wand 7 ab, die den ersten zylindrischen Abschnitt 5 mit einem zweiten zylindrischen Abschnitt 8 verbindet. Der zweite zylindrische Abschnitt 8 weist dabei einen größeren Durchmesser als der erste zylindrische Abschnitt 5 auf. The mixer housing 2 has a first cylindrical section 5, which tapers at the left end in FIG. 1 to form an outlet opening 6. From the first cylindrical portion 5 branches off a radially extending, flange-like wall 7, which connects the first cylindrical portion 5 with a second cylindrical portion 8. The second cylindrical section 8 has a larger diameter than the first cylindrical section 5.
Auf der Außenfläche des zweiten zylindrischen Abschnitts 8 sind Gewindesegmente 9 vorgesehen, welche ein Außengewinde zum Aufschrauben des Mischers 1 auf ein in Figur 7 dargestelltes Kartuschensystem 23 bilden. Auf der der Auslassöffnung 6 abgewandten Seite der radialen Wand 7 ist ein ringförmig umlaufender Steg 10 ausgebildet, der in nachfolgend näher beschriebener Weise einen Bestandteil einer Abdichtung gegenüber dem Deckel 3 bildet. Weiter sind auf der Innenseite des zweiten zylindrischen Abschnitts 8 Rastelemente 1 1 zur Verbindung des Mischergehäuses 2 mit Deckel 3 ausgebildet. On the outer surface of the second cylindrical portion 8 threaded segments 9 are provided, which form an external thread for screwing the mixer 1 on a cartridge system 23 shown in Figure 7. On the side facing away from the outlet opening 6 of the radial wall 7, an annular circumferential ridge 10 is formed, which forms part of a seal against the lid 3 in the manner described in more detail below. Further, on the inside of the second cylindrical portion 8 locking elements 1 1 for connecting the mixer housing 2 with lid 3 are formed.
Der Deckel 3 weist auf seiner in Figur 1 rechten Seiten zwei Einlassstutzen 12, 13 für die zu mischenden Komponenten auf. Die Einlassstutzen 12, 13 sind in der dargestellten Ausführungsform mit einem unterschiedlichen Durchmesser ausgestaltet, so dass Komponenten in unterschiedlichem Volumenverhältnis miteinander gemischt werden. Abweichend von der Darstellung in den Figuren ist es auch möglich andere Volumenverhältnisse oder identische Volumenver- hältnisse durch entsprechende Anpassung der Geometrie der Einlassstutzen in einem Mischer zu verarbeiten. The lid 3 has on its right in Figure 1 sides two inlet ports 12, 13 for the components to be mixed. The inlet ports 12, 13 are in the illustrated embodiment configured with a different diameter, so that components are mixed in different volume ratio with each other. Notwithstanding the representation in the figures, it is also possible to process other volume ratios or identical volume ratios by corresponding adaptation of the geometry of the inlet connection in a mixer.
Parallel zu den Einlassstutzen 12, 13 ragt eine Positionierungszunge 14 von der in Figur 1 rechten Seite des Deckels 3 weg, deren Länge größer als die der Einlassstutzen 12, 13 ist. Die Positionierungszunge 14 ist dabei im Querschnitt bogenförmig gekrümmt ausgebildet, so dass die Einlassstutzen 12, 13 automatisch Auslassstutzen einer Kartusche 23 treffen, wenn die Positionierungszunge 14 in eine entsprechend gestaltete Öffnung 26 der Kartusche eingesteckt wird. In Figur 7 ist zudem ein im Auslassbereich der Kartusche 23 vorgesehener Ring 24 dargestellt, der ein Innengewinde zur Verbindung mit dem Gewindesegment 9 aufweist. Auf einer von diesem Ring 24 umgebenen Platte, in die die Auslassstutzen der Kartusche 23 münden, sind gegenüber der Platte in Richtung des Mischers vorstehende Rippen 25 ausgebildet, die verhindern, dass der Mischer falsch aufgesetzt wird. Darüber hinaus kann eine solche Querverrippung zwi- sehen und/oder unterhalb der Auslassstutzen der Kartusche eine unerwünschte Verschleppung bspw. der Katalysator-Paste oder der Base-Paste eines Zweikomponentengemisches zum jeweils anderen Kanal vermeiden. Parallel to the inlet connection 12, 13 protrudes a positioning tongue 14 of the right in Figure 1 side of the lid 3, whose length is greater than that of the inlet nozzle 12, 13. The positioning tongue 14 is arcuately curved in cross section, so that the inlet nozzle 12, 13 automatically meet the outlet nozzle of a cartridge 23 when the positioning tongue 14 is inserted into a correspondingly shaped opening 26 of the cartridge. FIG. 7 also shows a ring 24 provided in the outlet area of the cartridge 23, which has an internal thread for connection to the thread segment 9. On a plate surrounded by this ring 24, into which the outlet ports of the cartridge 23 open, opposite the plate in the direction of the mixer protruding ribs 25 are formed, which prevent the mixer is placed incorrectly. In addition, such transverse ribbing between see and / or below the outlet port of the cartridge to avoid unwanted carryover example. The catalyst paste or the base paste of a two-component mixture to the other channel.
Das Befestigen eines erfindungsgemäßen Mischers 1 auf einer Kartusche 23 mit folgenden Schritten: Zuerst kommt die Positionierungszunge 14 ab einem bestimmten Punkt in Berührungskontakt mit der entsprechenden Aufnahme an der Kartusche, wobei anfänglich Spiel zwischen der Positionierungszunge 14 und der Aufnahme 26 in der Kartusche besteht. Danach fungiert die Positionierungszunge wie eine Führungsschiene in einem, z.B. konisch auslaufenden, Kanal in der Kartusche. In der Folge wird hierdurch der Mischer 1 durch das axiale Einschieben der Positionierungszunge 14 automatisch in der Kartusche 23 zentriert und ausgerichtet. Fastening a mixer 1 according to the invention on a cartridge 23 with the following steps: First, the positioning tongue 14 comes in touching contact with the corresponding receptacle on the cartridge at a certain point, whereby initially there is play between the positioning tongue 14 and the receptacle 26 in the cartridge. Thereafter, the positioning tongue acts as a guide rail in a, for example tapered, channel in the cartridge. As a result, thereby the mixer 1 through the axial insertion of the positioning tab 14 automatically centered and aligned in the cartridge 23.
Auf der äußeren Umfangsfläche des Deckels 3 ist eine Rastlippe 15 ausgebil- det, welche mit den Rastelementen 1 1 des Mischergehäuses 2 zur Befestigung des Deckels 3 in dem Mischergehäuse 2 zusammenwirkt. Der Deckel 3 kann auf diese Weise frei drehbar aber axial fest innerhalb des Mischergehäuses 2 fixiert werden. In dem Deckel 3 ist eine zentrale Durchgangsöffnung ausgebildet, die von einem Kragen 16 umschlossen wird, welcher ein Gleitlager für das Mischelement 4 bildet. Wie insbesondere aus den Figuren 2 und 4 ersichtlich ist, ist in dem Deckel 3 weiter ein im Wesentlichen zylindrischer Freiraum vorgesehen, der bereichsweise den Kragen 16 umgibt. Dieser Freiraum bildet in dem Mischer 1 u.a. eine Ringreservoirkammer 17. Der Durchmesser des Freiraums sowie die Position des Einlassstutzens 13 sind so gewählt, dass sich der Freiraum und die Öffnung des Einlassstutzens 13 in axialer Richtung teilweise überdecken. Eine durch den Einlassstutzen 13 einströmende Komponente kann somit zumindest teilweise ohne Umlenkung in die Ringreservoirkammer 17 gelangen. Diese Komponente gelangt dann in axialer Richtung in die Mischkammer. Wie insbesondere aus Figur 6 ersichtlich ist, mündet der kanalartig verlängerte Einlassstutzen 12 dagegen mit einer radialen Öffnung direkt in einen zum Mischraum zählenden Bereich des zylindrischen Freiraums des Deckels 3. Das Mischelement 4 ist als ein antreibbarer Mischerstab ausgebildet, der an seinem in Figur 1 rechten Ende als eine Hohlwelle mit einer Innensechskantkon- tur ausgebildet ist, in welche eine sechseckige Antriebswelle eingreifen kann. Der in dem Kragen 16 des Deckels 3 drehbar geführte Abschnitt des Mischelements 4 ist bereichsweise zylindrisch ausgebildet. Weiter ist an dem Mischelement 4 eine sich radial von diesem weg erstreckende, kreisförmige Platte 18 vorgesehen. Wie beispielsweise aus den Figuren 2 und 9 ersichtlich ist, sind in dem radial äußeren Bereich der Platte 18 vier ring- segmentartige Aussparungen 19 ausgebildet, welche sich jeweils um etwas weniger als 90° erstrecken. In dem Bereich der zwischen den Aussparungen 19 verbleibenden Stege der Platte 18 sind Mitnehmer 20 ausgebildet, welche durch senkrecht zu der Platte 18 verlaufende Wände gebildet sind. On the outer peripheral surface of the lid 3, a locking lip 15 is formed, which cooperates with the locking elements 1 1 of the mixer housing 2 for fixing the lid 3 in the mixer housing 2. The cover 3 can be fixed in this way freely rotatable but axially fixed within the mixer housing 2. In the cover 3, a central passage opening is formed, which is enclosed by a collar 16, which forms a sliding bearing for the mixing element 4. As can be seen in particular from FIGS. 2 and 4, a substantially cylindrical free space, which partially surrounds the collar 16, is provided in the cover 3. This clearance forms in the mixer 1, inter alia, a ring reservoir chamber 17. The diameter of the free space and the position of the inlet nozzle 13 are selected so that the free space and the opening of the inlet nozzle 13 partially overlap in the axial direction. A component flowing in through the inlet connection 13 can thus reach the ring reservoir chamber 17 at least partially without deflection. This component then passes in the axial direction in the mixing chamber. On the other hand, as can be seen in particular from FIG. 6, the channel-like prolonged inlet connection 12 opens with a radial opening directly into a region of the cylindrical clearance of the cover 3 counting to the mixing chamber. The mixing element 4 is designed as a drivable mixer rod which is right at its in FIG End is designed as a hollow shaft with a Innensechskantkon- tur, in which a hexagonal drive shaft can engage. The rotatably guided in the collar 16 of the lid 3 section of the mixing element 4 is partially cylindrical. Further, on the mixing element 4, a radially extending away from this, circular plate 18 is provided. As can be seen, for example, from FIGS. 2 and 9, four ring-segment-like recesses 19 are formed in the radially outer region of the plate 18, each extending slightly less than 90 °. In the region of the remaining between the recesses 19 webs of the plate 18 drivers 20 are formed, which are formed by perpendicular to the plate 18 extending walls.
Im zusammengebauten Zustand des Mischers 1 definiert die Platte 18 eine Begrenzungswand für die Mischkammer 17, welche in dem Deckel 3 ausgebildet ist. Die Position der Platte 18 auf dem Mischelement 4 ist dabei so gewählt, dass ausschließlich die über den Einlassstutzen 13 in den Mischer gelangende Komponente in die Ringreservoirkammer 17 geleitet wird, dort aktiv verteilt wird und von dort aus in den Mischraum fließt. Die durch den Einlassstutzen 12 in den Mischer gelangende Komponente wird dagegen auf der gegenüberliegenden Seite der Platte 18 radial in den Mischraum des Mischers 1 eingebracht, welcher im Wesentlichen durch den ersten zylindrischen Abschnitt 5 des Mischergehäuses 2 umschlossen wird. Die Platte 18 trennt somit die Ringreservoirkammer 17 von dem Mischraum und ermöglicht aufgrund der Aussparungen 19 eine Strömungsverbindung zwischen der Ringreservoirkammer 17 und dem Mischraum. Wie in Figur 8 gezeigt, erfolgt das Einströmen der Komponenten orthogonal zueinander, wodurch eine gute Mischung erreicht wird, ohne dass sich der Fließwiderstand merklich erhöht. Weiter sind an dem Mischelement 4 in mehreren Ebenen Arme 21 angeordnet, die zu einem Durchmischen der beiden Komponenten in dem Mischraum dienen. In the assembled state of the mixer 1, the plate 18 defines a boundary wall for the mixing chamber 17, which is formed in the lid 3. The position of the plate 18 on the mixing element 4 is chosen so that only the passing through the inlet port 13 into the mixer component is passed into the ring reservoir chamber 17, is actively distributed there and flows from there into the mixing chamber. On the other hand, the component entering the mixer through the inlet connection 12 is introduced radially on the opposite side of the plate 18 into the mixing chamber of the mixer 1, which is essentially enclosed by the first cylindrical section 5 of the mixer housing 2. The plate 18 thus separates the annular reservoir chamber 17 from the mixing chamber and, due to the recesses 19, allows a flow connection between the annular reservoir chamber 17 and the mixing chamber. As shown in Figure 8, the inflow of the components is orthogonal to each other, whereby a good mixture is achieved without the flow resistance increases significantly. Further, arms 21 are arranged on the mixing element 4 in several planes, which serve to mix the two components in the mixing chamber.
Im zusammengebauten Zustand des Mischers 1 ist das Mischelement 4 frei drehbar in dem Deckel 3 geführt, wobei der mit den Armen 21 versehene Ab- schnitt des Mischelements 4 in dem ersten zylindrischen Abschnitt 5 des Mischergehäuses 2 aufgenommen ist. Der Deckel 3 ist frei drehbar mit dem Mischergehäuse 2 verbunden, indem die Rastlippe 15 von den RastelementenIn the assembled state of the mixer 1, the mixing element 4 is freely rotatably guided in the lid 3, wherein the provided with the arms 21 Ab- section of the mixing element 4 is received in the first cylindrical portion 5 of the mixer housing 2. The cover 3 is freely rotatably connected to the mixer housing 2 by the locking lip 15 of the locking elements
1 1 des Mischergehäuses 2 hintergriffen wird. Eine Abdichtung zwischen dem Mischergehäuse 2 und dem Deckel 3 erfolgt über den ringförmigen Steg 10 des1 1 of the mixer housing 2 is engaged behind. A seal between the mixer housing 2 and the lid 3 via the annular web 10 of the
Mischergehäuses 2, welcher in eine entsprechende Nut 22 in dem Deckel 3 eingreift in der Art einer Labyrinthdichtung, die dann greift, wenn ein Mischer kraftschlüssig in die Kartusche eingeschraubt wird. In diesem zusammengebauten Zustand des Mischers befindet sich die Platte 18 des Mischelements 4 in einer Position, dass die beiden durch die EinlassstutzenMixer housing 2, which engages in a corresponding groove 22 in the lid 3 in the manner of a labyrinth seal, which then engages when a mixer is non-positively screwed into the cartridge. In this assembled state of the mixer, the plate 18 of the mixing element 4 is in a position that the two through the inlet port
12 und 13 eintretenden Komponenten auf gegenüberliegenden Seiten der Platte 18 an das Mischelement 4 gelangen, d. h. in zueinander in axialer Richtung des Mischers versetzten Ebenen. Die durch den im dargestellten Beispiel größeren Einlassstutzen 13 eintretende Komponente gelangt dabei zunächst in die Ringreservoirkammer 17, wobei diese Komponente durch die Rotation der Mitnehmer 20 zusammen mit dem Mischelement 4 so in der Ringreservoirkammer 17 verteilt wird, dass diese sich auffüllt. Die Drehung des Mischelements 4 bewirkt somit ein aktives Füllen der Ringreservoirkammer 17 insbesondere auch unab- hängig von einem etwaigen Gegendruck innerhalb des Mischers 1 . Enter 12 and 13 entering components on opposite sides of the plate 18 to the mixing element 4, d. H. in mutually offset in the axial direction of the mixer levels. The component entering through the larger inlet port 13 in the illustrated example initially passes into the ring reservoir chamber 17, whereby this component is distributed by the rotation of the drivers 20 together with the mixing element 4 in the ring reservoir chamber 17 so that it fills up. The rotation of the mixing element 4 thus causes active filling of the ring reservoir chamber 17, in particular also independently of any counter-pressure within the mixer 1.
Wenn die Ringreservoirkammer 17 zumindest weitgehend aufgefüllt ist, gelangt die durch den Einlassstutzen 13 einströmende Komponente durch die Aussparungen 19 auch in den Mischraum. Diese Komponente tritt somit in axialer Rich- tung in den Mischraum ein. Dagegen tritt die durch den Einlassstutzen 12 zugeführte Komponente in radialer Richtung in den Mischraum ein, wodurch sich bereits anfänglich eine gute Vermischung der beiden Komponenten ergibt. Diese Vermischung wird durch die sich mit dem Mischelement 4 drehende Arme 21 weiter intensiviert, so dass aus der Auslassöffnung 6 ein homogenes Ge- misch der beiden Komponenten austritt. Der in den Figuren 10 und 1 1 dargestellte Mischer weist am Deckel 3 ringförmige stirnseitige Dichtflächen 27 auf, die um die Einlasskanäle 12, 13 herum vorgesehen sind und auf denen der jeweilige Auslassstutzen der Kartusche zu liegen kommen. Diese Dichtflächen bewirken eine zu der radialen Dichtfläche am Außenumfang der Stutzen zusätzliche stirnseitige Dichtwirkung. When the ring reservoir chamber 17 is at least substantially filled up, the component flowing in through the inlet pipe 13 also passes through the recesses 19 into the mixing chamber. This component thus enters the mixing chamber in the axial direction. In contrast, the component supplied through the inlet port 12 enters the mixing chamber in the radial direction, resulting in a good mixing of the two components already initially. This mixing is further intensified by the arms 21 rotating with the mixing element 4, so that a homogeneous mixture of the two components emerges from the outlet opening 6. The mixer shown in Figures 10 and 1 1 has on the lid 3 annular end-side sealing surfaces 27 which are provided around the inlet channels 12, 13 around and on which the respective outlet nozzle of the cartridge come to rest. These sealing surfaces cause an additional end-side sealing effect to the radial sealing surface on the outer circumference of the nozzle.
Eine weitere Ausführungsform eines erfindungsgemäßen Mischers ist in den Figuren 12 und 13 dargestellt. Im Unterschied zu dem Mischer nach den Figu- ren 10 und 1 1 weist am Deckel 3 auf der radial inneren Seite des Stegs 10 eine ringförmige Dichtlippe 28 auf, die bei hohem Druck eine verbesserte Abdichtung bewirkt. Zudem ist das Mischelement 4 gegenüber der Ausführungsform von Figur 9 abgewandelt ausgebildet. Insbesondere sind die Mitnehmer 20 an der Platte 18 in Richtung zu der Kartusche verlängert ausgebildet, so dass die Ring- reservoirkammer 17 in Figur 12 nach unten im Wesentlichen vollständig verschlossen wird. Somit kann eine Kreuzkontamination, d.h. das ungewollte Fließen einer Komponente in den Einlassbereich der anderen Komponente, noch wirkungsvoller vermieden werden. Bei dem Mischelement 4 nach Figur 13 sind auch die Arme 21 der der Platte 18 zugewandten ersten Armebene (in Figur 13 unten) anders als die Arme 21 der übrigen Ebenen ausgestaltet. So ist an den Armen 21 an deren vertikaler Stirnseite (in Drehrichtung vorne) jeweils eine horizontale Wand 29 vorgesehen, die den Durchtritt der Komponenten in den Mischraum erschwert bzw. verlangsamt. Hierdurch findet eine intensivere Mischung der beiden Komponenten in dem Bereich statt, in welchem der Kanal des Einlassstutzens 12 in den Mischraum mündet. Another embodiment of a mixer according to the invention is shown in FIGS. 12 and 13. In contrast to the mixer according to FIGS. 10 and 11, on the cover 3 on the radially inner side of the web 10 there is an annular sealing lip 28 which effects an improved sealing at high pressure. In addition, the mixing element 4 is formed modified relative to the embodiment of Figure 9. In particular, the drivers 20 on the plate 18 are extended in the direction of the cartridge, so that the annular reservoire chamber 17 in Figure 12 is substantially completely closed down. Thus, cross-contamination, i. the unwanted flow of a component in the inlet region of the other component to be avoided even more effectively. In the mixing element 4 according to Figure 13 and the arms 21 of the plate 18 facing the first plane of the arm (in Figure 13 below) are designed differently than the arms 21 of the other levels. Thus, in each case a horizontal wall 29 is provided on the arms 21 at the vertical end face (in the direction of rotation front), which impedes or slows down the passage of the components into the mixing chamber. As a result, a more intensive mixing of the two components takes place in the region in which the channel of the inlet nozzle 12 opens into the mixing chamber.
Abweichend von der Darstellung in den Figuren 9 und 13 kann es für eine bes- sere Mischhomogenität vorteilhaft sein, am oberen (auslassseitigen) Ende des Mischerelemts 4 in Richtung des Mischerauslasses, wo sich in den Figuren 9 und 13 ein spitzer Kegel befindet, ein weiteres Mischblatt oder Mischelement einzubauen, was der Kontur der sich verjüngenden Mischerhülse folgt und in die Mündung des Mischers hineinragt. Notwithstanding the illustration in FIGS. 9 and 13, it may be advantageous for better mixing homogeneity at the upper (outlet-side) end of the Mischerelemts 4 in the direction of the mixer outlet, where in Figures 9 and 13 is a pointed cone to install another mixing blade or mixing element, which follows the contour of the tapered mixing sleeve and protrudes into the mouth of the mixer.
Die Vorteile des erfindungsgemäßen Mischers ergeben sich auch aus den nachfolgenden Vergleichsbeispielen : The advantages of the mixer according to the invention also result from the following comparative examples:
Die Messwerte in Tabelle 1 zeigen, dass die gemessenen Austragskräfte bei Verwendung des erfindungsgemäßen, strömungsoptimierten, dynamischen Mischers signifikant unterhalb der mit denselben Abformmaterialien gemessenen Werte mit dynamischen Mischern nach dem Stand der Technik liegen. The measured values in Table 1 show that the measured discharge forces when using the flow-optimized dynamic mixer according to the invention are significantly below the values measured with the same impression materials with prior art dynamic mixers.
Tabelle 1 Table 1
Austragskräfte von 2-Komponenten-Abformmaterialien aus 380 ml-Kartuschen (Mischungsverhältnis von Katalysatorpaste zu Base-Paste von 1 :5) mit verschiedenen dynamischen Mischern1' Discharge forces of 2-component impression materials from 380 ml cartridges (mixing ratio of catalyst paste to base paste of 1: 5) with different dynamic mixers 1 '
Vergleichsbeispiel 1 : Sulzer-Mixpac-System, Mischer MBD 381 -05-HS, Artikel- Nr. 1 1 621 1 , Lot-Nr. SO041 05 (gemäß EP 1 943 012) Comparative Example 1: Sulzer Mixpac System, Mixer MBD 381 -05-HS, Article No. 1 1 621 1, Lot no. SO041 05 (according to EP 1 943 012)
Vergleichsbeispiel 2: DMG-System (gemäß DE 10 2004 008 748) Comparative Example 2: DMG system (according to DE 10 2004 008 748)
Vergleichsbeispiel 3: Zhermack-System (gemäß EP 1 892 033) ' hierzu wurde die genannten Abformmaterialien in das jeweilige Kartuschen/M ischer-System abgefüllt und die Austragskrafte über eine entsprechende Messeinrichtung an der Universalprüfmaschine Zwick Z 0100 bei einem Vorschub von 46 mm/min unter Rotation des dynamischen Mischers mit 700 U/min erfasst. 2) Identium medium, Kettenbach GmbH & Co. KG, Typ 2 gemäß ISO 4823, Lot 1 10191 -60 Comparative Example 3: Zhermack system (according to EP 1 892 033) For this purpose, the abovementioned impression materials were filled into the respective cartridge / M ischer system and recorded the discharge forces via a corresponding measuring device on the universal testing machine Zwick Z 0100 at a feed rate of 46 mm / min with rotation of the dynamic mixer at 700 U / min. 2) Identium medium, Kettenbach GmbH & Co. KG, type 2 according to ISO 4823, Lot 1 10191 -60
3) Identium heavy, Kettenbach GmbH & Co. KG, Typ 1 gemäß ISO 4823, Lot 12021 1 -36 3) Identium heavy, Kettenbach GmbH & Co. KG, type 1 according to ISO 4823, Lot 12021 1 -36
4) Aquasil Deca putty, Dentsply DeTrey Inc., Typ 0 gemäß ISO 4823, Lot 607510 5) diese Kartusche/Mischer-Kombination ist nicht für das Austragen von medium- 4) Aquasil Deca putty, Dentsply DeTrey Inc., Type 0 according to ISO 4823, Lot 607510 5) this cartridge / mixer combination is not suitable for dispensing medium
Konsistenzen geeignet. Insbesondere die mechanische Stabilität der Kartusche ist nicht ausreichend, die auftretenden Kräfte aufzunehmen. Bei 5300 N platzte die Kartusche. Consistencies suitable. In particular, the mechanical stability of the cartridge is not sufficient to absorb the forces occurring. At 5300 N the cartridge burst.
6) diese Kartusche/Mischer-Kombination ist nicht für das Austragen von heavy- Konsistenzen geeignet. Insbesondere die mechanische Stabilität der Kartusche ist nicht ausreichend, die auftretenden Kräfte aufzunehmen. 6) This cartridge / mixer combination is not suitable for discharging heavy consistencies. In particular, the mechanical stability of the cartridge is not sufficient to absorb the forces occurring.
7) diese Kartusche/Mischer-Kombination ist nicht für das Austragen von putty- Konsistenzen geeignet. Insbesondere die mechanische Stabilität der Kartusche ist nicht ausreichend, die auftretenden Kräfte aufzunehmen. 7) This cartridge / mixer combination is not suitable for dispensing putty consistencies. In particular, the mechanical stability of the cartridge is not sufficient to absorb the forces occurring.
8) Bei den gemessenen Austragskräften zeigten sich Undichtigkeiten am Mischer und im Bereich der Verschlusskolben. 8 ) The measured discharge forces showed leaks at the mixer and in the area of the closure pistons.
Die Messwerte in Tabelle 2 zeigen, dass bei Verwendung des erfindungsgemäßen, dynamischen Mischers die Materialauswahl in der Labyrinthdichtung zwi- sehen Mischerhülse (PET) und Mischerdeckel (PP) und im Gleitlager an der Dichtstelle des Mischerstabs (POM) in der Laufbuchse im Mischerdeckel (PP) zu einer sehr guten Dichtigkeit gegenüber dynamischen Mischern nach dem Stand der Technik führen. Die Messwerte zeigen weiterhin, dass bei den dynamischen Mischern nach dem Stand der Technik die Dichtigkeit erst nach kosten- intensiven technischen Maßnahmen akzeptabel wird, zum Beispiel durch Einbau einer O-Ring-Dichtung im Bereich Mischerstab zu Mischerdeckel (siehe Vergleich der Beispiele Zhermack 2009 zu Zhermack 2012) oder durch Einführung einer Ultraschallverschweißung zwischen Mischerdeckel und Mischerhülse (siehe Vergleich der Beispiele Sulzer-Mixpac 2008 zu Sulzer-Mixpac 201 1 ). Die Auswahl von hochtransparentem PET in der Mischerhülse ist möglich, da beim erfindungsgemäßen Mischer keine Ultraschallverschweissung zwischen Mischerdeckel und Mischerhülse erforderlich ist. Die hohe Transparenz führt zu einer guten visuellen Kontrollmöglichkeit im Mischer während des Mischvorgangs. The measured values in Table 2 show that when using the dynamic mixer according to the invention, the material selection in the labyrinth seal between see mixing sleeve (PET) and mixer cover (PP) and in the plain bearing at the sealing point of the mixer rod (POM) in the liner in the mixer cover (PP ) lead to a very good seal with respect to dynamic mixers according to the prior art. The measured values also show that in the dynamic mixers according to the prior art, the tightness becomes acceptable only after cost-intensive technical measures, for example by installation an O-ring seal in the range mixer rod to mixer cover (see comparison of examples Zhermack 2009 to Zhermack 2012) or by introducing an ultrasonic welding between mixer cover and mixer sleeve (see comparison of the examples Sulzer-Mixpac 2008 to Sulzer-Mixpac 201 1). The choice of highly transparent PET in the mixer sleeve is possible because no ultrasonic welding between mixer cover and mixer sleeve is required in the mixer according to the invention. The high transparency leads to a good visual control in the mixer during the mixing process.
Tabelle 2 Table 2
Dichtigkeit und Transparenz von verschiedenen dynamischen Mischern1' beim Austragen von 2-Komponenten Dental-Abformmaterialien aus 380 ml- Kartuschen (Mischungsverhältnis Katalysator-Paste zu Base-Paste von 1 :5): Tightness and transparency of various dynamic mixers 1 'when dispensing 2-component dental impression materials from 380 ml cartridges (mixing ratio of catalyst paste to base paste of 1: 5):
Beispiele MaterialAbdichtungsprinBewertung Bewertung Bewertung kombination zip Hülse zu Transpa- Dichtigkeit2' Dichtigkeit2' Mischerstab Deckel renz ' Hülse - Deckel - Deckel Hülse Deckel Mischerstab Hülse Examples MaterialAbdichtungsprinBewertung Rating Rating combination zip sleeve to transparency tightness 2 'tightness 2' mixer rod cover ence 'sleeve - cover - cover sleeve cover mixer rod sleeve
ErfindungsPOM - PP - Labyrinthdichtung ++ ++ ++ gemäßer PET frei drehbar durch Invention POM - PP labyrinth seal ++ ++ ++ according to PET freely rotatable by
Mischer Verschraubung Mixer screw connection
des Mischers in of the mixer in
die Kartusche the cartouche
dichtend sealing
VergleichsPOM - PP - verrastet, nicht o + beispiel 1 PP drehbar VergleichPOM - PP - locked, not o + example 1 PP rotatable
VergleichsPOM - PP - ultraschallver- o ++ ++ beispiel 2 PP schweisst, nicht ComparisonPOM - PP - ultrasonic ver ++ ++ example 2 PP welds, not
drehbar VergleichsPOM - PP - zweifach verrastet o + swiveling VergleichPOM - PP - double locked o +
beispiel 3 PP nicht drehbar Example 3 PP not rotatable
VergleichsPOM - PP - vierfach verrastet o + ++ beispiel 4 PP nicht drehbar, 0- Ring-Dichtung am VergleichPOM - PP - locked four times o + ++ example 4 PP not rotatable, 0- ring seal on
Mischerstab mixer rod
Vergleichsbeispiel 1 :Sulzer-Mixpac-System 2008, Artikel: MDB 381 -05-00 (gemäß EP 1 943 012) Comparative Example 1: Sulzer Mixpac System 2008, Article: MDB 381 -05-00 (according to EP 1 943 012)
Vergleichsbeispiel 2: Sulzer-Mixpac-System 201 1 , Artikel: MDB 381 -05-HS (gemäß EP 1 943 012) Comparative Example 2: Sulzer Mixpac System 201 1, Article: MDB 381 -05-HS (according to EP 1 943 012)
Vergleichsbeispiel 3: Zhermack-System 2009 (gemäß EP 1 892 033) Comparative Example 3: Zhermack system 2009 (according to EP 1 892 033)
Vergleichsbeispiel 4: Zhermack-System 2012 (gemäß EP 1 892 033) Comparative Example 4: Zhermack System 2012 (according to EP 1 892 033)
1 ) hierzu wurde das Abformmaterial Identium medium in das jeweilige Kartu- schen/Mischer-System abgefüllt und eine Minute lang mit einem handelsüblichen Austragsgerät (Firma Renfert Sympress II) mit einem Vorschub von 46 mm/min und einer Mischerdrehzahl von 700 U/min ausgetragen und gemischt. Die Dichtigkeit des jeweiligen dynamischen Mischers wird visuell an der Dichtstelle Mischerstab zu Mischerdeckel und an der Dichtstelle Mischerhülse zu Mischerdeckel mit Hilfe einer Skala von ++ bis - - bewertet: 1) For this, the impression material Identium medium was filled into the respective cartridge / mixer system and discharged for one minute with a commercially available discharge device (Renfert Sympress II) with a feed rate of 46 mm / min and a mixer speed of 700 rpm and mixed. The tightness of the respective dynamic mixer is evaluated visually at the sealing point of the mixing rod to the mixer cover and at the sealing point of the mixing sleeve to the mixer cover by means of a scale from ++ to - -:
++: sehr gut, kein Masseaustritt ++: very good, no mass exit
+: geringer Masseaustritt +: low mass output
0: deutlicher, noch akzeptabler Masseaustritt 0: clear, still acceptable mass output
-: starker Masseaustritt -: strong loss of mass
- - : starker Masseaustritt mit Verschmutzung des Austragsgeräts/der Kartusche - -: heavy discharge of water with contamination of the dispenser / cartridge
2) hierzu wurde das Abformmaterial Identium medium in das jeweilige Kartuschen/Mischer-System abgefüllt und eine Minute lang mit einem handelsüblichen Austragsgerät (Firma Renfert Sympress II) gemischt und ausgetragen. Die hohe Transparenz ermöglicht eine optimale visuelle Mischkontrolle des Anwen- ders. Die Transparenz des jeweiligen Kunststoffs wird visuell an der Mischerhülse mit Hilfe einer Skala von ++ bis - - bewertet: 2) For this, the impression material Identium medium was filled into the respective cartridge / mixer system and mixed for one minute with a commercial discharge device (Renfert Sympress II) and discharged. The high transparency enables optimal visual mixing control of the user The transparency of the respective plastic is visually evaluated on the mixer sleeve using a scale from ++ to - -:
++: hochtransparent, Masse sehr deutlich erkennbar ++: highly transparent, mass very clearly visible
+: transparent, leichte Trübung, Masse gut zu erkennen +: transparent, slightly cloudy, mass clearly visible
0: deutliche Trübung, Masse scheint durch 0: clear haze, mass shines through
-: starke Trübung, Masse noch erkennbar -: severe cloudiness, mass still visible
- - : nicht transparent, Masse nicht erkennbar - -: not transparent, mass not recognizable
Die Messwerte in Tabelle 3 zeigen, dass die Ring Reservoir Kammer bei Ver- wendung des erfindungsgemäßen, dynamischen Mischers sich deutlich schneller vollständig füllt, als die Staukammern bei dynamischen Mischern gemäß dem Stand der Technik. Hierdurch entfällt das Risiko, das im späteren Verlauf des Mischens, wenn der Gegendruck im Mischer sich erhöht, Volumen- Dosierschwankungen durch spätes Auffüllen der Staukammer auftreten, die zu Mischinhomogenitäten im ausgetragenen Produkt führen . The measured values in Table 3 show that the ring reservoir chamber, when using the dynamic mixer according to the invention, completely fills completely faster than the storage chambers in dynamic mixers according to the prior art. This eliminates the risk that in the later course of mixing, when the back pressure in the mixer increases, volume Dosierschwankungen by late filling of the stagnation chamber occur, leading to Mischinhomogenitäten in the discharged product.
Tabelle 3 Table 3
Vergleich der verschiedenen dynamischen Mischer im Hinblick auf den Füllgrad der Staukammern zu verschiedenen Zeitpunkten nach Mischbeginn im Vergleich zum erfindungsgemäßen Mischer mit Ringreservoirkammer1 ) Comparison of the various dynamic mixers with regard to the degree of filling of the storage chambers at different times after the start of mixing in comparison to the inventive mixer with ring reservoir chamber 1)
Vergleichsbeispiel 1 : Sulzer-Mixpac-System (gemäß EP 1 943 01 2) Comparative Example 1: Sulzer Mixpac System (according to EP 1 943 01 2)
Vergleichsbeispiel 2: DMG-System (gemäß DE 10 2004 008 748) ' hierzu wurde ein mittelfließendes Dentalabfornnnnaterial, Typ 2 gemäß ISO 4823 in das jeweilige Kartuschen/Mischer-System abgefüllt und über ein Sympress I - Austraggerät der Fa. Renfert ausgetragen und über den jeweiligen dynamischen Mischer gemischt. Der Füllgrad der jeweiligen Staukam- mer/Ringreservoirkammer wurde durch Stoppen der Mischvorgänge nach 1 s, 1 ,5s, 2s, 2,5s, 3s und 4s visuell beurteilt. Comparative Example 2: DMG system (according to DE 10 2004 008 748) For this purpose, a medium-flowing Dentalabfornnnnaterial, type 2 according to ISO 4823 was filled into the respective cartridge / mixer system and discharged via a Sympress I - dispensing device from. Renfert and mixed on the respective dynamic mixer. The degree of filling of the respective storage chamber / ring reservoir chamber was assessed visually by stopping the mixing operations after 1 s, 1, 5 s, 2 s, 2.5 s, 3 s and 4 s.
Bezugszeichenliste: LIST OF REFERENCE NUMBERS
1 Mischer 15 Rastlippe 1 mixer 15 locking lip
2 Mischergehäuse 16 Kragen 2 mixer housing 16 collar
3 Deckel 17 Ringreservoirkammer 3 cover 17 ring reservoir chamber
4 Mischelement 18 Platte 4 mixing element 18 plate
5 erster zylindrischer Abschnitt 19 Aussparung 5 first cylindrical portion 19 recess
des Mischergehäuses 20 Mitnehmer of the mixer housing 20 drivers
6 Auslassöffnung 21 Arm 6 outlet opening 21 arm
7 Wand 22 Nut 7 wall 22 groove
8 zweiter zylindrischer Abschnitt 23 Kartusche 8 second cylindrical section 23 cartridge
des Mischergehäuses 24 Ring of the mixer housing 24 ring
9 Gewindesegment 25 Rippe 9 thread segment 25 rib
10 Steg 26 Öffnung 10 bridge 26 opening
1 1 Rastelement 27 stirnseitige Dichtflächen 1 1 locking element 27 frontal sealing surfaces
12 Einlassstutzen 28 Lippe 12 inlet ports 28 lip
13 Einlassstutzen 29 Wand 13 inlet port 29 wall
14 Positionierungszunge 14 positioning tongue
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP12748673.6A EP2618921B1 (en) | 2011-08-24 | 2012-08-10 | Mixer |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011111046 | 2011-08-24 | ||
| PCT/EP2011/068784 WO2012055926A1 (en) | 2010-10-26 | 2011-10-26 | Double cartridge, mixer therefor and combination of double cartridge and mixer |
| DE102012106093 | 2012-07-06 | ||
| PCT/EP2012/065743 WO2013026722A1 (en) | 2011-08-24 | 2012-08-10 | Mixer |
| EP12748673.6A EP2618921B1 (en) | 2011-08-24 | 2012-08-10 | Mixer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2618921A1 true EP2618921A1 (en) | 2013-07-31 |
| EP2618921B1 EP2618921B1 (en) | 2014-06-18 |
Family
ID=47745967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12748673.6A Active EP2618921B1 (en) | 2011-08-24 | 2012-08-10 | Mixer |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9463079B2 (en) |
| EP (1) | EP2618921B1 (en) |
| WO (1) | WO2013026722A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9522368B2 (en) * | 2010-10-26 | 2016-12-20 | Kettenbach Gmbh & Co. | Double cartridge, mixer therefor and combination of double cartridge and mixer |
| KR101355130B1 (en) | 2013-04-25 | 2014-01-27 | (주)디엑스엠 | Impression mixing tip |
| KR101406068B1 (en) * | 2013-09-05 | 2014-06-11 | (주)디엑스엠 | Impression mixing tip |
| US9827539B2 (en) * | 2015-07-31 | 2017-11-28 | Phillip Phung-I Ho | Dynamic mixer head |
| USD792177S1 (en) * | 2016-02-25 | 2017-07-18 | Phillip Phung-I Ho | Head for a dual-cartridge dispenser |
| CA3070174C (en) | 2017-07-28 | 2022-03-22 | 3lmed GmbH | Mixer with a compensation channel and/or reservoir chamber |
| DE102017117199A1 (en) | 2017-07-28 | 2019-01-31 | 3lmed GmbH | Mixer with compensation channel and / or stowage chamber |
| USD896970S1 (en) * | 2018-01-31 | 2020-09-22 | Kettenbach Gmbh & Co. Kg | Medical cartridge |
| DE102020134316A1 (en) * | 2020-12-18 | 2022-06-23 | Kulzer Gmbh | Rotor shaft with worm thread for a dynamic mixer for mixing low to high viscosity components |
| CN114871060B (en) * | 2022-05-19 | 2024-01-12 | 成都合达自动化设备有限公司 | Dynamic and static mixing glue injection valve |
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| US5033650A (en) * | 1987-03-09 | 1991-07-23 | Laurence Colin | Multiple barrel dispensing device |
| US4771919A (en) * | 1987-10-28 | 1988-09-20 | Illinois Tool Works Inc. | Dispensing device for multiple components |
| DE8900469U1 (en) * | 1989-01-17 | 1990-05-23 | Espe Stiftung & Co Produktions- und Vertriebs KG, 8031 Seefeld | Device for mixing and dispensing pasty masses |
| US4986820A (en) * | 1989-06-23 | 1991-01-22 | Ultradent Products, Inc. | Syringe apparatus having improved plunger |
| US5333760A (en) * | 1992-12-28 | 1994-08-02 | Coltene/Whaledent, Inc. | Dispensing and mixing apparatus |
| DE50007360D1 (en) * | 1999-11-12 | 2004-09-16 | Kettenbach Gmbh & Co Kg | Device for mixing two pasty materials, in particular for mixing a dental impression material with a catalyst material |
| ATE272440T1 (en) | 2000-03-29 | 2004-08-15 | Heraeus Kulzer Gmbh & Co Kg | DYNAMIC MIXER |
| DE10112904C5 (en) | 2001-03-15 | 2010-04-22 | 3M Espe Ag | Dynamic mixer and method for mixing at least two paste components |
| DE10164385C1 (en) | 2001-12-28 | 2003-03-06 | Kettenbach Gmbh & Co Kg | Device for mixing two paste-like substances for dental work includes first channel extending through coupling section and having first and second parts with adjoining deflection section inbetween to ensure constant mixing ratio at outlet |
| DE20302987U1 (en) | 2003-02-24 | 2003-04-24 | Ernst Muehlbauer Gmbh & Co Kg | Dynamic mixer, used for mixing components of dentistry compositions, comprises mixing tube, rotor delimiting annular mixing channel, and wall with inlet openings for components |
| JP2006519699A (en) * | 2003-03-06 | 2006-08-31 | デンツプライ インターナショナル インコーポレーテッド | Dispensing and mixing tips |
| DE60300822T2 (en) * | 2003-08-14 | 2006-04-13 | 3M Espe Ag | Mixing element for a multi-component paste mixer, and mixer with this mixing element |
| DE102004002654A1 (en) * | 2004-01-16 | 2005-08-18 | Heraeus Kulzer Gmbh | Device for level control of multi-component materials |
| GB0504990D0 (en) * | 2005-03-10 | 2005-04-20 | Cox Ltd | Dispensing appliance and cartridge therefor |
| US20070072146A1 (en) * | 2005-09-29 | 2007-03-29 | Dentsply Research And Development Corp. | Dispensing syringe having multiple barrels for discharging a dental composition |
| WO2007041878A1 (en) | 2005-10-07 | 2007-04-19 | Sulzer Mixpac Ag | Dynamic mixer |
| EP1836992A1 (en) * | 2006-03-10 | 2007-09-26 | 3M Innovative Properties Company | Mixing device and drive for the mixing device |
| EP1892033B1 (en) | 2006-08-21 | 2008-05-14 | ZHERMACK S.p.A. | Apparatus and method for mixing a multi-component substance for dental castings |
| DE102006047811A1 (en) * | 2006-10-06 | 2008-05-15 | Sulzer Chemtech Ag | Multicomponent cartridge |
| US7387432B2 (en) * | 2006-10-11 | 2008-06-17 | Meditech International Ltd.-Samoa | Slidable securing device for a mixer to allow communication between a mixer housing and a mixer inlet portion of the mixer |
| US8651731B2 (en) | 2007-09-10 | 2014-02-18 | Sulzer Mixpac Ag | Dynamic mixer |
| US9016522B2 (en) * | 2007-12-14 | 2015-04-28 | Discus Dental, Llc | Multi-compartment devices having dispensing tips |
| US7731413B2 (en) * | 2008-02-20 | 2010-06-08 | Zhermack S.P.A. | Mixer for multi-components substance for dental casting |
| TWI524932B (en) * | 2009-03-11 | 2016-03-11 | 素路彩米克斯派克股份有限公司 | Apparatus for the discharge of a filler material |
| TW201036711A (en) * | 2009-04-01 | 2010-10-16 | Phillip Phung-I Ho | Medicine mixing device |
| US8365958B2 (en) * | 2010-02-12 | 2013-02-05 | Phillip Phung-I Ho | Device for mixing and discharging plural materials |
| KR101913678B1 (en) * | 2011-02-28 | 2018-10-31 | 술저 믹스팩 아게 | Dynamic mixer and use thereof |
| IN2012DE01330A (en) * | 2011-07-22 | 2015-09-25 | Sulzer Mixpac Ag | |
| KR101406068B1 (en) * | 2013-09-05 | 2014-06-11 | (주)디엑스엠 | Impression mixing tip |
-
2012
- 2012-08-10 WO PCT/EP2012/065743 patent/WO2013026722A1/en not_active Ceased
- 2012-08-10 EP EP12748673.6A patent/EP2618921B1/en active Active
- 2012-08-10 US US14/240,283 patent/US9463079B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US9463079B2 (en) | 2016-10-11 |
| EP2618921B1 (en) | 2014-06-18 |
| WO2013026722A1 (en) | 2013-02-28 |
| US20140198602A1 (en) | 2014-07-17 |
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